Grand Som

Grand Som is a limestone peak in the Chartreuse Mountains reaching approximately 2000 meters in elevation with steep rocky faces. The mountain features sharp ridges and craggy terrain that stands out prominently when viewed from the valleys below.

The region has been traversed by people for a long time, though intensive exploration happened in recent decades. A cave system beneath the mountain was discovered and partially explored starting in 1966.

The summit features a prominent wooden cross that serves as a landmark visible from the surrounding area. This cross has become an important orientation point for hikers and shapes how the mountain is perceived locally.

Multiple marked hiking trails reach the summit, with varying difficulty levels depending on which route you choose. Good hiking boots and a map are recommended since the terrain is rocky and sometimes steep.

Beneath the summit lies a network of cave systems and vertical shafts that descend hundreds of meters underground. These underground structures make the mountain an important destination for cave explorers from across the region.

Location: Isère

Elevation above the sea: 2,026 m

Made from material: limestone

GPS coordinates: 45.37045,5.81200

Latest update: December 12, 2025 16:41